Throttle valve



H. C. RONEY.

THROTTLE VALVE.

APPLICATION FILED NOV, 10, I920. 1,409,783. Patented Mar. 14,1922.

2 SHkETS SHEET L H. C. RONEY.

THROTTLE VALVE.

APPLICATION FILED NOV. 10, 1520.

Patented Mar. 14, 1922.

2 SHtETS--SHEET 2.

UNITED STATES PATENT OFFICE.

ipeciiloatlon of Letters Patent. Patented Mar, 14, 1922.

Application filed Iovember 10,1920. Serial llo. 488,097.

To all whom it may concern:

Be it known that I, HENRY CLAY RONEY, a citizen of the United States, residing in Princeton, in the county of Mercer and State of West Virginia, have invented certain new and useful Improvements in Throttle Valves, of which the following is a specification.

This invention relates to locomotive throttle valves of the kind used in the steam dome to control .the passage of steam from the boiler to the steam chests which supply the steam engines of the locomotive. Throttle valves of this class are commonly located in a casin or box known as a throttle box which 1s detachably connected with the upper end of a stand pipe which in turn connects with the dry pipe through which steam is conveyed to the engine cylinders. The throttle box is formed with a valve seat or valve seats and the valve is raised and lowered by rods and levers actuated by suitable devices in the locomotive cab.

The steam dome is provided with a removable cap or cover which when withdrawn affords access to the valve mechanism for cleaning purposes or for repair. Heretofore, however, the valve operating mechanism has been so mounted and arranged that it has been necessary to disconnect it from the body of the dome and to remove the valve and the valve box whenever it is desired to enter the boiler or to inspect the boiler orthe interior of the dome.

According to my invention the throttle valve is supported by the stand pipe, which latter is supported by a bracket secured to the boiler on one side of the opening through which the stand pipe extends into the dome. The throttle box can be readily and quickly removed from the dome by disconnecting it from the stand pipe whenever desired. The valve and the valve box are so constructed that the boiler can be inspected without removing any part of the throttle valve or operating mechanism from the dome. In order to grind the throttle valve it is only necessary to remove the dome cap and one bolt that connects the valve operating arm with the valve, when the valve can be removed from the dome.

One of the main features of this invention is a pilot valve or drift valve of improved construction which can be so operated as to admit a limited quantity of steam from the dome to the stand pipe before the main throttle valve is raised or without raising the throttle valve.

Other features of the invention will be Figure 3 shows a similar section on the line 3-3 of Figure 1.

Fig. 3 is a sectional view of the throttle valve and the drift valve showing the vertical grooves in the central bore of the throttle valve.

The steam dome A is connected with the locomotive boiler B in the usual way. a indicates the upper part of the dome which is permanently connected with the lower part as shown. The dome cap a is removably connected with the upper part of the dome by fastening devices 0: of any preferred form. By removing the dome cap, the interior of the dome and the boiler may be reached without the removal of other parts. C indicates the dry pipe leading to the steam chests and D, the stand pipe which connects the dry pipe with the throttle box. D indicates a bracket attached at d to the boiler shell at one side of the opening d and which is so connected with the stand pipe as to assist in supporting it.

The upper end of the stand pipe is formed with a flange d to which is bolted the lower flanged end e of the valve box E. A cylindrical extension e from the lower portion of the valve box projects into the stand pipe, forming a joint therewith, and the lower portion of the valve box is provided with a valve seat 00. A valve seat y is formed at the upper end of the valve box and another valve seat a is formed in the box intermediate its upper and lower ends. (3 indicates ports in the side of the valve box through Which steam passes from-the dome to the interior of the box. It will be observed that there are a number of these ports arranged around the valve box in such manner as to Iigreely admit steam from the dome to the The valve G has an upper portion 9 adapted to seat on the box at y, a middle portion g which seats on the box at z, and a lower part which seats at m. It will be observer? that steam normally exerts ressure on the outside of the upper art of t e valve and also on the under si e thereof, thus artially balancing the valve. The valve E: has a central bore 7a. through which extends a pilot valve rod H which has a seat in the to of the valve G at h. The rod H exten 9 through the bore h and carries at its lower end a nut h. The rod H is sli htly smaller in diameter than the bore h and operates freely therein, but when the valve is lowered the passage of steam through the bore of the throttle valve is prevented. Vertical grooves or channels w are formed in the .walls of the bore h of the throttle valve and these grooves extend from the valve seat k to the lower end of the throttle h comes in contact with the throttle valve so v that a further movement of the drift valve will raise the throttle valve to the desired extent.

- The valve rod H is operated by an arm K detachably connected with) the rod H at and at its opposite end secured to a rock shaft L, the inner end of which is mounted to turn in a bracket Z secured to the u per part a of the dome. The outer end 0 the rock shaft carries a crank arm m which is connected with a rod M extending to the 10- comotive cab and operated by mechanism-N of well known construction. The shaft L extends through a threaded sleeve 0 fitted in theside of the dome top and it is adapt-- ed to turn in said sleeve. P indicates a packing gland which prevents leakage of steam'around the shaft L.

-By my improvements the pilot or drift valve may be operated without lifting the throttle valve. This pilot valve may thus be used for starting the engine or may be used while drifting. Steam passes directly from the steam dome past the drift valve to the dry pipe, thus ellminating the pulling out of draw heads and the breaing upnof trains while drifting. The valve 1s made in two parts only, namely, the main throttle valve and the drift valve, and can be used either with or without the lower valve part 9 While I have shown ports 0'' above the valve seat 2 it will be understood that when desired these ports may be used in connection with other ports. Access can be had to the valve mechanism much more readily than heretofore since there are no parts to be removed except the dome cap a.

When it becomes necessary to grind the throttle valve seats, the dome cap may removed and the crank K disconnected from the valve and valve G may be withdrawn, thereby exposing the seats 3 z and w for grindin The oiler may be entered by removing the dome cap a only. The valve box, throttle valve and operating mechanism may be dismantled or replaced without the elay that usually occurs with the throttle valve and rigging that is used on most locomotives in the present day. removin the bolt 70 the arm K ma be disconnects from the valve very quick y.

I claim as m invention:

1. The combination with the steam dome and stand pipe of a locomotive, of a throttle valve box connected with the stand pipe havin seats for the throttle valve, a throttle va ve operating in the boxand having a central bore connected at its lower end with the stand pipe, a drift valve having a lim-v ited vertical movement in the bore of the throttle valve for controlling the passage of steam therethrough, and means for operating the drift valve.

2. The combination with the steam dome and stand pipe of a locomotive, of athrottle valve box connected with the stand pipe havi seats for the throttle valve, a throttle va ve operating in the box and having a central bore connected at its lower end with the stand pipe, a drift valve having a limited vertica movement in the bore of the throttle valve and controlling the assage of steam therethrough, and means or operating the drift valve and the throttle valve.

3. The combination with the steam dome and stand pipe of a locomotive, of a throttle valve box connected with the stand pipe having seats for the throttle valve, "a throttle va ve operating in the box having a central core connected at its lower end with the stand pipe, and having vertical grooves for conveymg steam from the steam dome to the stand pipe, a drift valve having a limited vertical movement in the bore and controlling the passage of steam through said grooves from the steam dome to the stand pipe, and means for operating said drift valve.

4. he combination with the steam dome and standpipe of a locomotive of a detachable cap for the dome, a throttle valve box supported on the standpipe within the dome, a throttle valve operating in the valve box, a rock shaft supported by the dome above. the top of the throttle valve box, a crank arm rigidly secured to the 'rock shaft, and a detachable connection between said crank arm and the upper portion of the throttle valve.

5. The combination with the steam dome and standpipe of a locomotive, of a cap for the dome, a throttle valve box on the standpipe within the dome, a throttle valve operating in the valve box, a drift valve operating 1n the throttle valve, a rock shaft carried by the dome above the valve box and connected with the upper portion of the drift valve, and means for operating said rock shaft.

6. The combination with the steam dome and standpipe of a locomotive, of a cap for the dome, a valve box supported on the standpipe Within the dome, a throttle valve operating in said box, a drift valve having a limited movement in the throttle valve, a rock shaft carried by the dome above the throttle valve and Which is connected With the upper portion of the drift valve, a sleeve attached to the dome through which the rock shaft extends, packing for the sleeve and rock shaft attached to the dome, and means for operating the rock shaft.

7. The combination with the steam dome and stand pipe of a locomotive, of a throttle valve box supported by the stand pipe having three valve seats arranged at different levels, a throttle valve operating in said box and having valve portions engaging said three seats, and means for operating said throttle valve.

8. The combination With the steam dome and standpipe of a locomotive of a throttle valve box detachably connected with the stand pipe and having a seat for the throttle valve, a throttle valve operating in the box and having a central bore passing entirely therethrough and communicating at its lower end with the stand pipe, a drift valve having a limited vertical movement in said bore for controlling the passage of steam therethrough, means for operatlng the drift valve, and means detachably connecting the upper end of the drift valve with the operating means.

In testimony whereof, I have hereunto subscribed my name.

HENRY CLAY RONEY. 

